By who? I'm not disputing it because I run arb lockers, but just because you are the first person I've ever heard say that. I think any selectable locker has the propensity for failure just because of the additional moving parts and the fact that it relies on an outside source to power it. Last time out in my father in laws, we lost the front arb. It was an install issue though. The copper supply line got chewed by the gears. My daily driver truck has a factory electronic locker and time will tell how it holds up. I had issues with my Toyota e locker in my last dd. All electrical issues with it. I personally think that the Detroit is the most reliable locker there is. It sacrifices road manners for awesome off road performance. I ran one for 7 years in the rear of my last yj. It was great. Never an issue. I got used to driving with it on the road. After having arb's though, I forgot how nice it is to be able to drive with an open diff on the road. Lay orbitals hard as I want around a corner and no ill effects.

Ok I've read this thread twice now and am a bit confused. Hopefully not high jacking the thread, but making clarity. If a lunchbox locker is installed does this make the front drive shaft continuously spin while in 2wd rolling down the road? Does one have to install them on both front and rear diffs?

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Ok I've read this thread twice now and am a bit confused. Hopefully not high jacking the thread, but making clarity. If a lunchbox locker is installed does this make the front drive shaft continuously spin while in 2wd rolling down the road? Does one have to install them on both front and rear diffs?

Yes the front shaft will spin, that may or may not be a problem. Some people have a problem with front driveshaft vibrations. I didn't have this issue, but it's easy enough to fix if you do.

No you don't have to put them front and rear. I ran only the front for a while, Mr.B here on the forum runs an Aussie up front and an ARB in the 8.8.

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It is literally a 5 minute job to balance it and a 5 minute job to pull the driveline out.

Tj's spin their front drive shafts 100% of the time with a stock front axle. Not many issue there.

The TJ to YJ comparison is a little farfetched. The pinion is higher on the Yj and the TJ came stock with a double cardan shaft that was balanced from the factory. It is really cheap to have the Yj shaft balanced (locally at least) it will not react the same as the TJ shaft. The main problem with the Yj shaft is the slip yoke wearing out. Any vibrations in the shaft will expedite the need for a new pinion seal. I just had a new seal installed with my gears in 2011 so with a constantly turning stock driveshaft I will let you know if my seal goes out prematurely. You can always pull a vibrating shaft.

THANK YOU for all the comments and replies. After much research, this thread, several conversations with friends who have YEARS more experience than I do, and a volley of emails with Bill Cole from Aussie, I've decided that the Wrangler will be having lunch down under in the near future.

No show down needed. But I can give you facts. I seem to be the lone voice on this board when it comes to lunchboxes. I have the powertrax No-slip lunchbox. IMHO, it is the best lunchbox out there. Of course that is just my opinion. However, I have been beating on it for almost 10 years!!! I have also inspected it and with all the hard core wheeling I do (Rubicon, ect.) and it shows practically no wear. That is fact. Of course anything can break... but I'd say that is a purdy good track record. I suppose most guys don't look at the Powertrax b/c of the cost. They are about a hundred more than the others. And I'm not saying the others are bad. But as they say, you get what you pay for.
Having said all that. I'd rather have a selectable up front b/c of the type of rock crawling I do. But for most, the lunchbox is just fine.

The TJ to YJ comparison is a little farfetched. The pinion is higher on the Yj and the TJ came stock with a double cardan shaft that was balanced from the factory. It is really cheap to have the Yj shaft balanced (locally at least) it will not react the same as the TJ shaft. The main problem with the Yj shaft is the slip yoke wearing out. Any vibrations in the shaft will expedite the need for a new pinion seal. I just had a new seal installed with my gears in 2011 so with a constantly turning stock driveshaft I will let you know if my seal goes out prematurely. You can always pull a vibrating shaft.

So I say it needs to be balanced which is an easy job. Then you say it will have problems unless it is balanced which is a really easy job???????????